Revert "Add pre-upgrade task for moving credentials file" (#2393)

.gitignore

 .vagrant
 *.retry
 inventory/vagrant_ansible_inventory
-inventory/credentials/
 inventory/group_vars/fake_hosts.yml
 inventory/host_vars/
 temp

roles/kubernetes/preinstall/tasks/main.yml

@@ -3,11 +3,6 @@
   tags:
     - asserts
 
-# This is run before bin_dir is pinned because these tasks are run on localhost
-- import_tasks: pre_upgrade.yml
-  tags:
-    - upgrade
-
 - name: Force binaries directory for Container Linux by CoreOS
   set_fact:
     bin_dir: "/opt/bin"

roles/kubernetes/preinstall/tasks/pre_upgrade.yml

----
-- name: "Pre-upgrade | check if old credential dir exists"
-  local_action:
-    module: stat
-    path: "{{ inventory_dir }}/../credentials"
-  register: old_credential_dir
-  become: no
-
-- name: "Pre-upgrade | check if new credential dir exists"
-  local_action:
-    module: stat
-    path: "{{ inventory_dir }}/credentials"
-  register: new_credential_dir
-  become: no
-  when: old_credential_dir.stat.exists
-
-- name: "Pre-upgrade | move data from old credential dir to new"
-  local_action: command mv {{ inventory_dir }}/../credentials {{ inventory_dir }}/credentials
-  args:
-    creates: "{{ inventory_dir }}/credentials"
-  become: no
-  when: old_credential_dir.stat.exists and not new_credential_dir.stat.exists